syzkaller login: [ 38.799446] BUG: Bad rss-counter state mm:00000000104e15e9 type:MM_FILEPAGES val:32 [ 38.800809] BUG: Bad rss-counter state mm:00000000104e15e9 type:MM_ANONPAGES val:22 [ 38.996516] ================================================================== [ 38.997669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.998928] Read of size 8 at addr ffff88800dc3ed08 by task sshd/221 [ 38.999825] [ 39.000072] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.001035] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.002098] Call Trace: [ 39.002446] [ 39.002754] dump_stack_lvl+0x91/0xf0 [ 39.003282] print_report+0xcc/0x620 [ 39.003821] ? __virt_addr_valid+0x102/0x340 [ 39.004420] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.005106] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.005776] kasan_report+0xbe/0xf0 [ 39.006285] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.006965] vma_interval_tree_remove+0xc75/0xec0 [ 39.007664] vma_prepare+0xc54/0x11a0 [ 39.008196] __split_vma+0x5af/0x950 [ 39.008717] ? __pfx___split_vma+0x10/0x10 [ 39.009291] ? find_held_lock+0x2c/0x110 [ 39.009870] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.010495] ? lock_is_held_type+0x9f/0x120 [ 39.011091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.011744] ? mtree_range_walk+0x632/0x900 [ 39.012347] ? mas_walk+0x5c7/0x7c0 [ 39.012857] do_vmi_munmap+0x1f1/0x2b0 [ 39.013398] mmap_region+0x1f9/0x2660 [ 39.013931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.014494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.015274] ? __pfx_lock_acquire+0x10/0x10 [ 39.015860] ? __pfx_mmap_region+0x10/0x10 [ 39.016447] ? security_mmap_addr+0x7d/0xa0 [ 39.017034] ? get_unmapped_area+0x1f5/0x3f0 [ 39.017643] do_mmap+0x854/0xf00 [ 39.018124] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.018673] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.019288] ksys_mmap_pgoff+0x3af/0x500 [ 39.019855] do_syscall_64+0x3f/0x90 [ 39.020388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.021099] RIP: 0033:0x7fac1644ed82 [ 39.021601] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 39.023918] RSP: 002b:00007ffc216d6c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.024873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac1644ed82 [ 39.025758] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac15888000 [ 39.026637] RBP: 00007fac15888000 R08: 0000000000000009 R09: 0000000000001000 [ 39.027552] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560977d6b980 [ 39.028490] R13: 00007ffc216d6c90 R14: 00007ffc216d6cc0 R15: 00007ffc216d7020 [ 39.029430] [ 39.029748] [ 39.029983] Allocated by task 214: [ 39.030448] kasan_save_stack+0x22/0x50 [ 39.030988] kasan_set_track+0x25/0x30 [ 39.031528] __kasan_slab_alloc+0x59/0x70 [ 39.032108] kmem_cache_alloc+0x16b/0x370 [ 39.032668] vm_area_dup+0x20/0x160 [ 39.033164] __split_vma+0x170/0x950 [ 39.033675] split_vma+0xc6/0x110 [ 39.034150] mprotect_fixup+0x8d2/0xb30 [ 39.034697] do_mprotect_pkey+0x87e/0xd40 [ 39.035252] __x64_sys_mprotect+0x78/0xc0 [ 39.035834] do_syscall_64+0x3f/0x90 [ 39.036351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.037047] [ 39.037276] Freed by task 214: [ 39.037699] kasan_save_stack+0x22/0x50 [ 39.038227] kasan_set_track+0x25/0x30 [ 39.038761] kasan_save_free_info+0x2b/0x50 [ 39.039326] __kasan_slab_free+0x10a/0x190 [ 39.039928] kmem_cache_free+0x10d/0x4d0 [ 39.040470] rcu_core+0x8c8/0x2860 [ 39.040959] __do_softirq+0x1b7/0x7d4 [ 39.041472] [ 39.041701] Last potentially related work creation: [ 39.042310] kasan_save_stack+0x22/0x50 [ 39.042839] __kasan_record_aux_stack+0x8e/0xa0 [ 39.043446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.044123] remove_vma+0x139/0x170 [ 39.044603] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.045193] do_vmi_munmap+0x1f1/0x2b0 [ 39.045706] __vm_munmap+0x138/0x3a0 [ 39.046214] __x64_sys_munmap+0x59/0x80 [ 39.046735] do_syscall_64+0x3f/0x90 [ 39.047243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.047954] [ 39.048185] The buggy address belongs to the object at ffff88800dc3ecb0 [ 39.048185] which belongs to the cache vm_area_struct of size 168 [ 39.049719] The buggy address is located 88 bytes inside of [ 39.049719] freed 168-byte region [ffff88800dc3ecb0, ffff88800dc3ed58) [ 39.051222] [ 39.051458] The buggy address belongs to the physical page: [ 39.052148] page:0000000060784d8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc3e [ 39.053295] memcg:ffff88800de0a201 [ 39.053750] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.054488] page_type: 0xffffffff() [ 39.054964] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388f80 dead000000000005 [ 39.055981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de0a201 [ 39.056958] page dumped because: kasan: bad access detected [ 39.057650] [ 39.057876] Memory state around the buggy address: [ 39.058487] ffff88800dc3ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.059390] ffff88800dc3ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.060297] >ffff88800dc3ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.061188] ^ [ 39.061649] ffff88800dc3ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.062554] ffff88800dc3ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.063449] ================================================================== [ 39.064477] Disabling lock debugging due to kernel taint [ 41.085341] BUG: Bad rss-counter state mm:00000000d73c1359 type:MM_FILEPAGES val:33 [ 41.086391] BUG: Bad rss-counter state mm:00000000d73c1359 type:MM_ANONPAGES val:22 [ 41.581269] BUG: Bad rss-counter state mm:000000007546ccc0 type:MM_FILEPAGES val:33 [ 41.583007] BUG: Bad rss-counter state mm:000000007546ccc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25195' (ECDSA) to the list of known hosts. 2023/06/20 14:18:21 fuzzer started 2023/06/20 14:18:21 dialing manager at localhost:36067 2023/06/20 14:18:21 checking machine... 2023/06/20 14:18:21 checking revisions... [ 42.265932] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:18:21 testing simple program... [ 42.298171] cgroup: Unknown subsys name 'net' [ 42.343366] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:18:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801833b850 RCX=0000000000000000 RDX=0000000000000018 RSI=0000000000000000 RDI=ffffed1003067710 RBP=00000000000000f0 RSP=ffff888016557b68 R8 =0000000000000006 R9 =0000000000000002 R10=ffffed100306770a R11=00000000000b6a61 R12=ffff88801833b850 R13=0000000000092cc0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff84513430 RFL=00000256 [---ZAP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2931d83900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f2932338650 CR3=000000000e8e4000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c114ab RBX=0000000000000002 RCX=ffffffff8608a556 RDX=0000000000000001 RSI=dffffc0000000000 RDI=ffffffff8608a558 RBP=ffff88806cf09aa8 RSP=ffff88806cf09990 R8 =ffffffff8608a55a R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09af8 R15=ffff88806cf09a50 RIP=ffffffff811311c3 RFL=00000212 [----A--] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe8fb7b9900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe8fac5faa8 CR3=000000000d5b4000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4c1fe2de366a12f500000000000ae988 XMM05=66b25e1c088383c40000000000133518 XMM06=00c3ffa147b8d8570000000000132308 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000